Typographical machine



April 4, 1939.

W. H MEDFORD TYPOGRAPHICAL MACHINE Filed Jan. 15, 1938 3 Sheets-Sheet lATTORNEYS April 1939- w H. MEDFORD TYPOGRAPHICAL MACHINE Filed Jan. 15,1958 3 Sheets-Sheet 2 INVNTbR.

MZZ J9. BY

7%mw ATTORNEYS April 1939- w. H MEDFORD 2,153,150

TYPOGRAPHICAL MACHINE Filed Jan. 15, 1933 5 Sheets-Sheet 3 INVEIGTOR.

BY- WZQGCo M ATTORNEYS Patented Apr. 4, 1939 UNITED STATES PATENT OFFICE5 Claims.

My invention relates to a new and improved guard for a typographicalmachine.

One of the objects of my invention is to improve that type oftypographical machine which is known in the trade as Intertype No. H.

Another object of the invention is to provide a guard which is connectedto and which moves in unison with the pot which contains the moltenmetal, and to provide automatic means whereby the cover of said guard ismoved into operative position over the mold in which the matrices arelocated, before the slug is molded. Said cover is maintained in positionwhile the mold is bein filled with the molten metal, so that the moltenmetal cannot squirt upwardly from the mold, if the matrices and thespacers do not completely fill the mold.

Another object of the invention is to provide a device of this type,whereby relief means are pro-- vided so as to prevent the breakage ofthe guard, if the movement of the guard to its operative position isobstructed by means of the defective operation of the machine,

Another object of the invention is to provide a simple and efficientmechanism which can be attached to existing machines and which willoperate properly in the very limited space in which such an attachmentcan be installed.

Other objects of the invention will be set forth in the followingdescription and drawings which illustrate a preferred embodimentthereof, it being understood that the above statement of the objects ofmy invention is intended generally to explain the same without limitingit in any manner.

Fig. 1 is a perspective view showing the guard detached from thetypographical machine.

Fig. 2 is a perspective view of the bracket which is fixed to the frameof the machine and which causes the movement of the guard cover to theoperative position.

Fig. 3 is a sectional view on the line 3-3 of Fig. 1.

Fig. 4. is a sectional view on the line 4-4 of Fig. 1.

Fig. 5 is a side elevation showing the attachment and certain adjacentparts of the typographical machine. In Fig. 5 the guard is shown in itsinoperative position.

Fig. 6 is the same as Fig. 5 save that in Fig. 6 the guard is shown inits operative position.

Fig. '7 shows the position of the guard when a part of the machineinterferes with the movement of the guard to the fully operativeposition which is shown in Fig. 6.

Fig. 8 is a front elevation, taken on the line 8-8 of Fig. 5.

Fig. 9 is a sectional view on the line 9-9 of Fig. 8. In Fig, 9 theguard is shown in its inoperative position.

Fig. 10 is the same as Fig. 9 save that in Fig. 10 the guard is shown inits operative position.

Fig. 11 is a sectional view on the line "-4 I of Fig. 8.

Fig, 12 is a sectional view on the line l2-l2 of Fig. 11.

In operating a typographical machine of the aforesaid type, the mold mayhave one or more spaces, due to various causes, through which the moltenmetal can squirt upwardly, when said lead is delivered under usualpressure to said mold. This molten lead can seriously injure theoperator, as it spurts upwardly to such a height that it can fall backupon the operators head or hands.

This defect has rendered the operation of such machines both uncertainand hazardous.

It has been proposed to use a partial fixed guard over the top of themold, but this is ineffective, and it interferes with the properoperation of the machine.

According to my invention a movable cover is provided which is mountedon the pot which contains the molten metal, and said cover may benormally urged to the inoperative position so that it does not interferewith the proper operation of the machine, and said cover is movedautomatically into its operative position over the mold before themolten metal is delivered to the mold. Likewise said cover is maintainedautomatically in its operative position, during the molding operation,until the molten metal has solidified in the mold.

Referring to Fig. 1, this shows a guard-cover I having an end portion laintegral with said guard-cover I. Said members I and la are connected toarms 2 and 2a which are turnably connected by means of pivot pins 3 and3a, to the ends of a frame 4.

The pins 3 and 3a may be stud-pins which are fixed to the frame 4. Thearm 2a is fixed to the gear 5 so that said gear 5 turns in unison withthe movement of the guard-cover. The gear 5 meshes with the gear teethof a sector 6. The gear teeth of the sector 6 have a much larger pitchdiameter than the pitch diameter of the teeth of the gear or pinion 5.

Therefore the angular turning movement of the sector 6 is much less thanthe angular turning movement of the gear or pinion 5.

The sector 6 is turnably mounted upon a stud pin I which is fixed to theadjacent portion of the frame 4. The gear ratio between the gear 5 andthe sector 6 may be about one to four.

The sector 6 is provided with an upstanding pin 8. This pin 8 is mountedupon an angular head 6a. of the sector 6. The frame 4 is mounted uponthe pot 9, which is moved to and fro in the usual manner. Said potcontains the molten metal.

I have not illustrated the details of construction of the pot 9 and theother well known accessory parts of a typographical machine.

The invention is illustrated particularly in connection with thetypographical machine which is known in the trade as Intertype N o. H.This pot 9 is provided with the usual openings I through which themolten metal is delivered to the mold.

In Fig. 8, only some of the casting holes Ill are shown, as this detailis well known.

In Fig. 5, the pot 9 is shown in its inoperative or non-moldingposition. In Fig. 10 said pot 9 is shown in its operative or moldingposition. The pot 9 is supported in the usual manner upon an arm 9a,which is provided with a yokeshaped end, to which a supplemental memberI la is suitably connected.

Bearing screws II have their ends fitting in suitable recesses which areprovided in a shaft I 2, so that the pot 9 can be rocked towards andaway from the operative casting position which is shown in Fig. 6.

Referring to Fig. 2 and Fig. 8, the frame F of the machine has the arm Il fixed thereto. The arm I4 is provided with a slot 14a by means ofwhich said arm l4 can be adjustably clamped to the frame F, by means ofclamping members which extend through said slot Ma.

As shown in Fig. 2, the arm I 4 has alateral pin I5 fixed thereto. Thispin I5 is integral with a head I6 which has an upstanding pin I1 fixedthereto. The pins 8 and I! are provided with lateral grooves, as shownin Fig. 1 and Fig. 2.

As shown in Figs. 9 and 10, a tension spring IS (a part of said springbeing shown in Fig. 12) is connected to said pins 8 and I1. Said tensionspring I8 tends to maintain the guard-cover I normally in theinoperative position which is shown in Fig. 9.

The arrows indicated in Fig. 9 show the respective directions in whichthe spring l8 tends to turn the sector 6 and the guard-cover I.

As shown in Fig. 2, the head It is provided with a plunger I9. As shownin Fig. 12, the head I6 is provided with a suitable recess. A part ofthe plunger I9 is located in said recess and said plunger I9 fitsslidably within said recess. Said plunger I9 has a reduced shank 20which passes through the end wall of the head I6.

A helical compression spring 2! is coiled around the shank 20 so thatsaid compression spring tends to force the plunger I9 out of the headI6. The projecting portion of the shank 20 is externally threaded, andone or more lock nuts 22 limit the outer movement of the plunger I9,under the force of the compression spring 2|.

As shown in Fig. 10, when the pot 9 is moved to its molding position,the head Ba abuts the outer end of the plunger I9, before the pot hasmoved to its final molding position, and before the molten metal isdelivered from said pot.

As the pot isinoved to its molding position,

the tension of the spring I 8 is lowered, as can be seen by comparingFig. 9 and Fig. 10.

When the plunger l9 abuts the head 6a, the further movement of the pot 9to its molding position, causes the sector 6 to turn, as indicated bythe respective arrows in Fig. 10, so that the guard-cover I is turned toits operative position over the mold, in the direction of the respectivearrow indicated in Fig. 10.

As shown in Fig. 7, if the machine is not operating perfectly, an arm ofthe machine may remain in the path of the cover. For example, Fig. 7shows the arm 23 of the delivery slide, in the path of movement of theguard-cover, this being one of the contingencies which may arise due toimperfect operation of the typographical machine. Under suchcircumstances, the compression spring 2I yields sufficiently so as toprevent the parts from breaking.

Figs. 5-7 show the yoke 24, which forms part of the delivery slide.

In order to show the relation of the improvement to the standard partsof the aforesaid typographical machine, I have shown the elevator E inFigs. 5 and 6. Thiselevator delivers the matrices to the mold 39, inwhich the slug is molded.

Certain conventional parts of the typographical machine have beenillustrated in broken lines, in order to bring out the invention moreclearly.

In the specific machine which has been illustrated, the mold isstationary and the pot is moved. This may be defined by stating thatthere is relative movement between the pot 9 and the mold 30 and theinvention generally covers any machine in which there is relativemovement between the pot and the mold, and in which a guard is moved tointercept molten metal which may be squirted out of the mold when the.pot and the mold are in the casting position illustrated in Fig. 6 andin Fig. 10.

For convenience, the member I 9 may be designated as an abutment memberand the gear 5 may be designated as a first gear member and the sector 9may be designated as a second gear member. It will be noted that theabutment member I9 contacts with the second gear member 6 at apredetermined point in the movement of the guard 9 towards the mold 313,so as to cause the guard 9 to be moved to its operative position beforethe casting is begun. Likewise the abutment member I9 is yieldinglyconnected to the frame so as to stop the positive movement of the guardto its operative position, if said movement of the guard is obstructed.

I have shown a preferred embodiment of my invention, but it is clearthat numerous changes and omissions can be made without departing fromits spirit.

I claim:

1. In a typographical machine which has a mold and which has a pot whichis movable towardsand away from said mold, a guard pivotally mounted onsaid pot, and means operative to turn said guard relative to said pot sothat the guard is moved over the top of said mold when the pot is movedto casting position.

2. In a typographical machine which has a mold and which has a pot whichis movable towards and away from said mold, a guard pivotally mounted onsaid pot, and means operative to turn said guardrelative to said pot sothat the guard is moved over the top of said mold when the pot is movedto casting position, said means including an abutment member which isconnected to the frame of the machine.

3. In a typographical machine which has a mold and which has a pot whichis movable towards and away from said mold, a guard pivotally mounted onsaid pot, and means operative to turn said guard relative to said pot sothat the guard is moved over the top of said mold when the pot is movedto casting position, said means including an abutment member which isconnected to the frame of the machine, said abutment member beingyieldingly connected to the frame of the machine so that it can yieldsufiiciently to cause the guard to remain in inoperative position if themovement of the guard to its operative position is obstructed.

4. In a typographical machine which has a mold and a pot which ismovable towards and away from the mold, a guard pivotally mounted on thepot, a first gear member also mounted on the pot and connected to saidguard and turnable in unison with the guard, a second gear member alsomounted on the pot and intermeshing with the first gear member, thesecond gear member having gear teeth whose pitch diameter exceeds thepitch diameter of the gear teeth of the first gear member, a springhaving one end connected to the second gear member and having the otherend connected to the frame of the machine, said spring being operativeto turn the second gear member, when the pot is at its maximum distancefrom the mold so as to keep the guard spaced from said mold, and anabutment member connected to the frame of the machine and adapted toabut the second gear member at a predetermined point in the movement ofthe pot towards the mold so as to turn the second gear member and tocause the guard to be turned to its operative position over the top ofthe mold.

5. In a typographical machine which has a mold and a pot which ismovable towards and away from the mold, a guard pivotally mounted on thepot, a first gear member also mounted on the pot and connected to saidguard and turnable in unison with the guard, a second gear member alsomounted on the pot and intermeshing with the first gear member, thesecond gear member having gear teeth whose pitch diameter exceeds thepitch diameter of the gear teeth of the first gear member, a springhaving one end connected to the second gear member and having the otherend connected to the frame of the machine, said spring being operativeto turn the second gear member, when the pot is at its maximum distancefrom the mold so as to keep the guard spaced from said mold, and anabutment member connected to the frame of the machine and adapted toabut the second gear member at a predetermined point in the movement ofthe pot towards the mold so as to turn the second gear member and tocause the guard to be turned to its operative position over the top ofthe mold, said abutment member being yieldingly connected to the frameso that it can yield sufiiciently to stop the actuation of the guard toits operative position if the movement of said guard to its operativeposition is obstructed.

WALTER H. MEDFORD.

